Feed control for shaping-machine worktables



Nov. 6, 1928. 1,690,583

H. W. JACOBSON FEED CONTROL FOR SHAPING MACHINE WORKTABLES Filed April1925 2 Sheets-Sheet 1 I anon U606 351 fifty/nut QJMQM Nov. 6, 1928.

H. W. JACOBSON FEED CONTROL FOR SHAPING MACHINE WORKTABLES Filed April1925 2 Sheets-Sheet z 0 v n w n a Patented Nov. 6, 1928.

untrue srA'rss r 1,690,583 ATENT OFFICE.

HUGO W. JACOBSON,

HARIDT, 0F NEWARK, NEW" OF ARLINGTON; NEW JERSEY, ASSIGNOR TO GOIl'LZD'& EBE-R- JERSEY, ACOBPGIt-ATIOIN OF NEW JERSEY.

FEED CONTROL non SHAPING-MACHINE WDRKTABLES.

Application filed April 2, 1925 Serial No. 20,127.

My invention is concerned with feeding mechanism for a shaping machineand is particularly concerned with feedingmechanism which may becontrolled from the table of the shap ng machine.

In shaping machines of modern construction a ram which is mounted on-topof the machine frame, is reciprocated through various lengths of strokesaccording to'the work being operated on. The ram carries a tool headwhich may be operated to move the tool towards or away from the workbeing operated on. A work carrying table which is locatedbelow the toolhead, is slidab-ly mounted on a cross head secured to the main frame ofthe machine, A screw shaft which is rotatably mounted on the cross head,is connected with a stationery nut on the table for effecting movementof the table along the head. A machine, as above de scribed. is oftencalled upon to shape a piece of work to a form, which will requirefeeding movements by the tool at the same time that the feedingmovementsof thetable are being effected. If the tool is forming ahorizontal surface on the work it is apparent that only feedingmovements by the work carrying table need be effected by the machine.However, if the surface cut by the tool on the work varies from ahorizontal plane, it is apparent vertical feeding movements must also beeffected bythe tool headv r In many shaping mach nes heretoforeconstructed, the manual'feeding of the work table has been accomplishedsolely by a hand lever fitted to the end of the screw shaft. The handwheel or lever which is locatedon the rain for feeding the tool, ispositioned some distance from the hand lever for op erating the tablefeed screw. and. accordingly renders it difficultfor the operatorlocated at. the side of the table to control both feeding movementssimultaneously. If the left hand of the operator is used to operate thetool feed it is apparent the left arm obscures the opera-tors vision ofthe work. Moreover it is very inconvenient for the operator to controlthe tool feed by means of his right table feed by means of hisleft-hand.

In. a feeding mechanism constructed 1n accordance with my invention,anoperating,

rod projects from the table at'the end ofthe shaper forcontrollino; thefeeding, movement oftlie tabla A control. handle mounted on that theymay with my invention; Ft

hand and operate the such operating shaft can be easily operated by theleft hand of the operator without in any way interfering with his visionof the work. In my preferred construction the operating shaft on thetable carries a bevelled gear wheel. which meshes with a bevelled gearwheel splined to a shaft mounted on the cross head parallel to the tablefeed screw. The two shafts on the cross head are connected together bygearing so as to rotate together.

Thus it is apparent rotationof the operating shaft on the table rotatesthefeed screw shaft to effect feeding movement of the table. v

It has been proposed heretofore to control the feed nut on the table bymeans of an operating shaft on the table. In such mechanism the feednutis rotated and't-he Screw shaft on the railis held stationary when itdesired'to operate'the table feed by mechanism mounted on the table. Ifthe table is fed by rotating; the screw shaft on the cross head it isnecessary to have the feed hat on thetable locked against rotation. Thelooking and unlocking of the feed nut on the table and the screw shafton the crosshead is an added ope 'ation for the machine oper- To enableothers SklllGCtlII the art so fullyto apprehend the underlying featureshereof embody the same in the various" ways conten'iplate'd by thisinvention, drawings depicting a preferredtypical construction havebe'enannexed as a part ofthis" disclosiirreand. in such drawings, likechar actors of reference denote corresponding parts throughout all theviews, of-wliich;-

Figure 1 isan end elc ational view of a shaping machine constructed inaccordance 2 is a partial front elevational view of the shaping machineshown in Fig. 1. Fig. 3'is a sectional view illustrating the shafts forcontrolling the table feeding movement.

Referring to thedrawings, a shaping machine is illustrated comprisingam'ain'frame 1 on which is mounteda cross head 2 and a work carrying.table 3' braving a saddle 3 v secured to the cross head. The cross head2 is secured to the main frame 1 in any conventionalmanner and isvertically moved on the main frame by means of a screw shaft 4. A shaft5 is provided for operating a nut ,(not shown) to effect movement of thehead 2 along the screw shaft e. A ram is mounted on the top the frame 1and carries a tool head 31. The tool head 31 carries carries thecutting. tool, and the mechanism for reciprocating the ram. v Thesaddleon the work carrying table 3 ismounted on and slidable along the crosshead 2. The cross head 2 is provided with two cross arms 6 and 7 whichsupport and also, guide the work carrying table 3. The movement of thework carrying table 3 alongthe cross head is effected by means of mentof the work table a screw shaft9 which is .rotatably mounted in thehead. The screw shaft 9 is fitted to a stationary nut 10 which forms apart of or I Inasmuch as the nut 10 isheld stationary on the workis'secured to the worktable.

table it isapparent rotation of the screw shaft 9 serves to effecttranslatory move The screw shaft 9 may be automatically operated bymeans of a connecting rod 11 in a conventional manner ormay be manuallyoperated by means of a crank lever (not shown) which is fitted to the,squared end .12 shown in the draw- .ings. The automatic operationof thescrew shaft 9eforms no feature of my invention and it is accordinglydeemed unnecessary to describethe automatic operation of the screwshaft. Such automaticmechanisms areold and well-known in the. art. r I Atransverse shaft 15 isinounted on the cross head 2 parallel to the screwshaft 9.

Such transverse shaft15 is connected to the screw shaft 9 by means ofgear wheels 16 and 17, the gear wheel 16 being fixedly mounted on theshaft 15 and the gear wheel 17 being fixedly mounted 011 i 9. Thus,.-itis apparent rotation of the shaft 15 compels rotation'of the screw shaft9 and accordingly feeding movement bythe work carrying table.

meshes with a bevelled gear wheel 19 on an operating shaft 20. 'Tlieoperating shaft 20 and the bevelled gear wheels 18 and 19 are mounted onthe work carrying table 3 and I serve to control the manual feedingmovement of the table in a manner. to be hereinafter more fullydescribed; The bevelled (not the, screw shaft The transverse shaft: 15carries a bevelled gear wheel 18 which gear wheel 18 is provided with adisk portion having the bevel teeth formed thereon and a hub portion 21which extends through a bracket 22 on the tableas best shown in Fig. 3of the drawings. A collar member 23, which encircles the transverseshaft 15, is secured to the hub member 21. The bevelled gear wheel'l8 issplined to the trans 'collar'member 25' which encircles the operatingshaft 20 is secured to the end of the hub portion 24 in any suitablemanner to prevent axial movement ofthe bevel gear wheel in the bracket22. i

In the mechanism above described it is parentthe squared end 26 of shaft20 may be apthe operating operated by a hand crank shown) forcontrolling the feeding movements of the work table 3. The operatingshaft 20 rotates the transverse splined shaft 15 by means of the gearwheels 18 and 19. 15 by means of the gear wheel 16 and 17 compelsrotationof the screw shaft 9. Accordingly, the screw shaft 9 may notonly be operated by a hand crank onits own squared end 12 but also maybe operated by a hand crank on thesquared end 26 of the operating shaft20. In the above construction it will be noted that it is umiecessary toin anyway change the relationship ofthe nut 10 tothe screw shaft 9 whenthe feeding movements ofthe table are controlled by the operating shaft20. Moreover, it is unnecessary to disconnect the shaft 20 or thesplined shaft 15 from the screw shaft 9 when the crew shaft 9 isoperated manually by the squared end 12 or is operated automatically bymeans of the lever 11. 7

Without further analysis, the foregoing will so fully reveal the gist ofthis invention that others can, by applying current knowledge, readilyadapt it for various utilizations by retaining one or more of thefeatures that, from the standpoint ofthe prior art, fairly constituteessential characteristics of either the generic or specific aspects ofthis invention, and, therefore, such adaptations shouldbe, and areintended to be, comprehended within the meaning and range ofequivalencyof the following claims.

Having thus revealed this invention, I

claim as new and desire to secure the following combinations and 'lentsthereof, by Letters elements, or equiva- Pat ent of the United Statese 1. A shaping machine combining a frame; a reciprocating ram; anormally stationary The splined shaft cross head secured to the framebeneath the ram; a work table movable horizontally on said cross head; afeed screw rotatably but non-translatably journaled in said cross head,said screw being provided at one end with means for effecting manualrotation thereof; a non-rotatable nut carried by said work-table andhaving a threaded connection with said screw; a single purpose shaftrotatably and non-translatably journaled in said cross head parallelwith said screw; a

spur gear connection between said shaft and said screw; a pair of matingbevel gears carried by said work-table, one of said gears having aspline connection with said single purpose shaft; an operating shaftrot-atably journaled in said table transverse to said single purposeshaft'and connected to the other of said bevel gears; and manual meansfor rotating said operating shaft from the front end of said work-table.

2. A shaping machine combining a. frame; a reciprocating ram; avertically adjustable tool carried at the front end of said ram; a crosshead fixed to said frame beneath said ram; a. work-table translatablymounted on said cross head; a feed screw rotatably and non-translatablyjournaled in said cross head; a non-rotatable nut carried by saidwork-table and having a threaded connection with said feed screw; powermeans connected with said feed screw to rotate the latter thereby toeffect power translation of said work-table; manually actuated meansengaging one end of said feed screw to effect rotation thereof; andauxiliary single purpose means carried by said work-table below saidtool and operable from the front end of the work-table and permanentlyconnected with said feed screw to rotate the latter to effecttranslation of said work-table.

3. A shaping machine combining a frame; a cross head fixed thereto; awork-table translatably mounted on said cross head; a feed screwrotatably but non-translatably journaled in said cross head; a nutnonrotatably carried by said work-table and having a threaded connectionwith said feed screw; manual means for rotating said feed screw toeffect translation of said work-table; and auxiliary manually actuablemeans including a manually rotatable shaft carried by said \vorletableand permanently and positively connected. with said feed screw forrotating the latter to effect translation of said work-table, saidauxiliary means also including a second shaft journaled in said. crosshead; a positive drive between the last named shaft and the feed screw;and a spline connection between the manually rotatable shaft and thesecond shaft.

In \vitness whereof, I have hereunto subscribed my name.

HUGO W. JACOBSON.

